Metal-studded tire.



J. R. GAMMETER.

METAL STUDDED TIRE. APPLICATION FILED MAY 2. 1916.

1,2M,53?. Patentefi Fek. as, $912.

A r'romvs y l l liil a M un-M ih-SlSIC-NQE T6 THE 33. E. GOQDBIEHCUM'PANY, CRZEJZQRAAEGH OF NEW 01 2,19"

hiiIETiAL-SKUDDTED TIRE.

mm-ram specification cflhetters rarest.

resell tree res, s, ism,

lz ipplicetion filed May 2, 3,916. Serial No. 94,894;

fur improvements in Metal-Studded Tires, of which the following is a specification.

his invention relates to pneumatic tire he metal studs on the tread to lg extra gripping it heretobeen a dii'iicult mutter properly to enstuds to the body of the tire, the 1 method being to affix them to a leather hoof 15 carcass, but

and not w its object to provide of reasonable cost,

are securely anchored 'ore firmly attached to the liable than formerly r 3 transverse section of 's pneucasin provided with my improvean cnl nged section represents a plan view ction of one of the in- .n t' stud anchorage. similar views of the Referring to the drawings, indicates s clencher tire casing Whose carcass is made up in the usual Way of layers of irictioned fabric 11 (for 'ch cord layers may be subst" d) ind n thickened rubber icorporste plubreaker strips as y the ususl location the strips 15 have on 1- serving as an anitiouzil I ror the me,

l traction studs 16 and strips in order to insure a very firm anchorage'ttor the studs. Eech stud 16 15 pro- Y enel ted in the run-' n A i g lugs, Figure l eds 12, covered by rub-- which for con-- .end of sgud stem.

the use of three such.

vided with a head 17 which forms the wearing and grip pingniember for engagement with the ground, and is further provided with a cylindricalstem 18 passing through the fabric strips 15. The inner portion of SQPhlflllOIS between the fabric strips 15.-

These plates are cut away as shown at 23 in Fi 3 to form holes or recesses occupied by the rubber of the tread Well, so that the fabric strips are rubber-locked or vu1canized to each other through the plates 22 within the stud structure; Further to pro mote the internal locking of the rubber with said structure, the under side of the stud head 17 is undercut or grooved at 2%.

it will be seen that the studs 16 are thereby separately anchored, to the respective fabric strips 15, and the latter in turn are thoroughly embedded in and separated from each other by thetreadrubber. vThe tread is made up separately from the carcass with alternate layers of rubber and rubberized fabric 15, the latter being laid one ply at s through the several said strips, a spacing washer on the stem located between two of ssid strips, and s rivet Washer on the inner 2. A'pneumstic tire having in the tread Wall thereof a plurallty of fabric strips and rubber, a, serieslof tractlon studs each having an outer head, a stem passingthr'ough the i.

severalssid. strips, swasher riyeted on the inner end or said stem, and a spacing washer strips, said located between two of sai spacing washer being slidably guided on said,

stem and formed with a. serieS of recesses each stud having :1 head at its outer 'end undercut on its inner-side to receive the treuci rubber. 10

In testimony whereof I have hereunto set my hand this 39th day-of April, 1916.

JQHN R. GAMMETER. 

